Chief Manufacturing CMS390, CMS391 installation instructions Installation, Security

Installation Instructions		CMS390/CMS391
INSTALLATION
NOTE: The CMS-390 and CMS-391 attach to a 1-1/2" NPT
threaded column in a finished ceiling with 16" on-center
(CMS-390) or 24" on-center (CMS-391) wood joists. In		(G
addition, both the CMS-390 and CMS-391 can be
installed in line on a single joist.	6	(G) x 1(F
1. Remove end caps from ceiling plate (A). (See Figure 1)
(A)
		Figure 3
End caps	Security
	1. For increased security, remove two set screws from ceiling
	plate and replace with two 5/16-18 x 5/8" security set
Figure 1	screws (F). Tighten with 5/32" security hex wrench (H).
	(See Figure 4)

2.Drill two 1/8" pilot holes into wood joists.

3.Install ceiling plate (A) to ceiling using two 1/4-20 x 3-1/2" lag bolts (B) and two 1/4" flat washers (C). (See Figure 2)

4.Re-install end caps onto ceiling plate (A). (See Figure 2)

(A)
	4
4
(C) x 2
3	((B) x 2

	1	(F) x 2(F
2	(E) x 1
		(A)
		Adjustment
		Set Screws
		(D) x 1

Figure 4

2.For additional security, remove Phillips screw in threaded collar of ceiling plate and replace with one 10-24 x 1/4" button head security cap screw (E) through security spinner

(D). Tighten with 5/32" security hex wrench (H). (See Figure 4)

Adjustment

Figure 2

5.Install 1-1/2" NPT threaded column (not included) into threaded collar on ceiling plate (A).

6.Install one 10-24 x 1/4" Phillips head screw (G) into threaded collar and tighten. (See Figure 3)

To adjust position of ceiling plate, loosen adjustment set screws, adjust plate to position, and tighten screws. (See Figure 4)

5